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Defined Benefit and Postretirement Benefits | 9 Months Ended
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Sep. 30, 2023
Retirement Benefits [Abstract] |
Defined Benefit and Postretirement Benefits | Defined Benefit and Postretirement Benefits For all plans, the components of net periodic benefit for the three months ended September 30, 2023, and 2022 are as follows:
| Pension |  | Postretirement
(in millions) | 2023 |  | 2022 |  | 2023 |  | 2022
Service cost | $ | 0.5 |  |  | $ | 0.6 |  |  | $ | — |  |  | $ | — |
Interest cost | 0.5 |  |  | 0.2 |  |  | 0.2 |  |  | 0.2 |
Expected return on plan assets | (0.8) |  |  | (0.8) |  |  | — |  |  | — |
Amortization of prior service cost | (0.1) |  |  | (0.1) |  |  | (0.3) |  |  | (0.3) |
Amortization of net (gain) loss | — |  |  | 0.3 |  |  | (0.2) |  |  | — |
Net periodic expense (benefit) | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | (0.3) |  |  | $ | (0.1) |
For all plans, the components of net periodic benefit for the nine months ended September 30, 2023, and 2022 are as follows:
| Pension |  | Postretirement
(in millions) | 2023 |  | 2022 |  | 2023 |  | 2022
Service cost | $ | 1.4 |  |  | $ | 1.7 |  |  | $ | — |  |  | $ | 0.1 |
Interest cost | 1.6 |  |  | 0.6 |  |  | 0.6 |  |  | 0.5 |
Expected return on plan assets | (2.4) |  |  | (2.3) |  |  | — |  |  | — |
Amortization of prior service cost | (0.5) |  |  | (0.5) |  |  | (0.8) |  |  | (0.8) |
Amortization of net (gain) loss | — |  |  | 0.7 |  |  | (0.5) |  |  | — |
Net periodic expense (benefit) | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | (0.7) |  |  | $ | (0.2) |
The components of net periodic benefit, other than the service cost component, are included in “Miscellaneous income, net” in our Unaudited Consolidated and Combined Condensed Statements of Operations. Service cost is recorded within “Cost of sales” and “Selling, general and administrative” in our Unaudited Consolidated and Combined Condensed Statements of Operations. We expect to contribute the following to our pension and postretirement plans:
(in millions) | Pension |  | Postretirement
Expected contributions in 2023 | $ | 2.6 |  |  | $ | 1.5 |
Amounts contributed during the nine months ended September 30, 2023 | $ | 2.1 |  |  | $ | 1.4 |

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